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Stellar Occultation by (9031) 1989 WG4 on 2024-07-25 (21:07:08 UT)

CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.


Event Details
 Occultation UUID [and db] : 323a5c70-ddb5-11f0-547e-e16cee9e1147 [observed]

 Occultation Date + Time   : 2024-07-25 at 21:07:08 UT +/- 0.0 min  [1]
 Object Designation        : (9031) 1989 WG4
 Star Designation          : GDR3 4065545020817298048
 Star Coordinates (ICRF)   : RA = 18 17 42.0615, DE = -23 50 45.671  [2]
 Star Magnitudes           : G = 13.29 mag, RP = 12.37 mag, BP = 14.17 mag
 Object Magnitude          : V = 17.62 mag
 Estimated Magnitude Drop  : 4.3 mag
 Estimated Max. Duration   : 0.6 sec
 Speed of the shadow       : 7.7 km/s
 Object Mean Diameter      : 4.7 km  (src: astorb) => apparent = 5 mas
 Apparent Motion           : 0.4583 arcs/min @ PA = 254 deg
 Horizontal Parallax       : 6.3100 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 90° (sunlit = 75%), Sun = 151°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.06 path-width (1-sig)
 RUWE and duplicate source : 0.9 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#67
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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